Support bracket for concrete forms



Oct. 14, 1969 Filed Jan. 16, 1967 FIG! P. JUHL.

SUPPORT BRACKET FORl CONCRETE FORMS 3 Sheets-Sheet 1 99;( l (c\ F lF|G|4 7l W 29 l IO OI o N 34 o I D.. l 7.

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af -0 28 11;. 7o 73 HNN INVENTOR PAUL JUHL BY j/zwwwfm ATTORNEYS Oct.14, 1969 P. JUHL 3,472,477

SUPPORT BRACKETV FORl CONCRETE FORMS Filed Jan. 1,6, 1967 s sneeiS-'shei2 06f. 14, 1969 P JUHL SUPPORT BRACKET FOR CONCRETE FORMS 3 Sheets-Sheet3 Filed Jan. 16, 1967 United States Patent O 3,472,477 SUPPORT BRACKETFOR CONCRETE FORMS Paul Juhl, 310 Kenmore Ave., Elmhurst, Ill. 60126Filed Jan. 16, 1967, Ser. No. 609,563 Int. Cl. E04g 17/16, 11/20 U.S.Cl. 249--219 4 Claims ABSTRACT OF THE DISCLOSURE Brackets for supportingform plates for pouring circular walled concrete structures and whichprovide for movement upward on previously poured wall sections toposition the form plates for pouring the next layer or section. Thebrackets are arranged to slide directly against a previously pouredsection and to be secured thereto by nuts on bolts anchored in thepreviously poured section.

BACKGROUND OF THE INVENTION In the construction of circular coolingtower walls of poured concrete, and similar structures it has been thepractice to use form plates or arcuate forms which were raised after thepouring and setting of each layer. The invention relates to a supportnigand adjusting means for form plates which are raised after the pouringof each layer and a bracket therefor which is of simple construction andeasy to adjust and to secure relatively to bolts arranged in verticalrows in previously poured layers of concrete.

SUMMARY OF THE INVENTION An object is to provide such a bracket whichcan be supported directly from a series of bolts which extend from thepreviously iinished wall in a vertical line and preferably which slidedirectly against the finished wall so that they may be bolted thereto bynuts on the bolts.

Another object is to provide such a bracket comprising a lowerchannel-like portion with an elongated slot therein through which thebolts in the finished portion of the wall project, a laterally andoutwardly extending intermediate portion and an upper post memberextending from the outer end of the intermediate portion and spaced fromthe form plates, together with means on the post member for adjustablysupporting the adjacent form plates and also opposing form plates.

Other objects will become readily apparent from the following detaileddescription taken in connection with the drawings, in which:

FIG. 1 is a fragmentary vertical section through a wall showing, in sideelevation, a preferred form of the invention;

FIG. 2 is a top plan view of the structure in FIG. 1;

FIG. 3 is a horizontal view along the line 3-3 of FIG. 1;

FIG. 4 is a fragmentary plan view along the line 4-4 of FIG. 1;

FIGS. 5, 6, 7, 8 and 9 are fragmentary sectional views along the lines-5 to 9 9 of FIG. 1;

FIG. 10 is a view, partly in section, along the line 10-10 of FIG. l;

FIG. 1l is a view along the line 11-11 of FIG. l;

FIG. 12 is a fragmentary view of an upper corner of a form plate;

FIG. 13 is an enlarged view of a portion of FIG. 4; and

ice

FIG. 14 is an enlarged fragmentary section similar to FIG. 6 showing aform of supporting bolt in more detail.

Although there is herein shown and described a preferred form of theinvention, it is to bel understood that this is not intended to limitthe invention to the particular form and arrangement shown. The scope ofthe invention is pointed out in the appended claims.

As shown in the drawings, the invention is applied to a concretewall Wwhich is generally multi-sided or somewhat annular in shape, the side W'being referred to as the inner side of the Wall and the side W" as theouter side of the wall. A form plate supporting bracket indicatedgenerally at 10 is positioned against the outer side of the wall and isarranged vertically thereof so that it may be secured to the wall bymeans of nuts on the outer ends of a series of bolt devices B whichextend through the lower or hardened portion of the wall and arearranged in vertical lines spaced apart generally as shown in FIG. 2, sothat an outer bracket 10" is associated with one vertical line of bolts,whereas an adjacent inner bracket 10 is associated with an adjacent lineof bolts.

As shown best in FIGS. l and 10, the preferred form of form platesupporting bracket comprises a lower channel-like member 20 having acentral slot 21 therein, an intermediate, horizontally and outwardlyextending portion 22, and an upper post member 23 secured at its lowerend to the outer end of the intermediate portion 22 and extendingupwardly at a slight angle from the vertical and spaced outwardly fromthe adjacent form plate structure 24 hereinafter more fully described.

As seen best in iFIG. 7, the channel-like member 20 is formed from apair of opposed angle members 25 suitably welded to elongated plates 25.These angleplate elements are secured together in the arrangement shownby means of an upper transverse U-shaped member 26 and a lower U-shapedmember 27, both welded thereto so as to form a rigid structure. Theintermediate horizontally extending portion 22, as shown in FIG. 6, consists of a pair of plate members 28 and 29 having ends 30 and 31 weldedto the plates 25 and ends 32 and 33 welded to the post member 23. Thepost member 23"is in the form of a relatively square tube.

The parts 20, 22 and 23, which are suitably welded together, form whatmay be referred to as a stiff-back and constitute the main portion ofthe form plate supporting bracket. As mentioned hereinbefore, thechannellike member 20 is adapted to be clamped directly against theouter surface of the wall Wl by means of nuts 34 on the bolt devices Bas shown in FIGS. 6 and 10.

In the form shown, form plates 24 for the outside surface of the nextsection of the wall W, and which may be made of plywood sheets 35 ofappropriate size, are provided with horizontally extending reinforcingmember 36 sometimes referred to as whalers. The members 36, which may beof wood, are suitably secured to the sheets 35 so as to form unitaryform plates 24, the outer such form plates, as shown in FIG. 1, havingtheir lower ends extending slightly below the upper end of the linishedwall at 37. An opposing inner form plate of similar construction isshown at 40.

As shown best in FIG. 2, bracket 10" is located on the outside of thewall W for supporting the form plates 24. For this purpose the formplate supporting brackets are provided with an outer, verticallyextending channel-like member or head 42 and an opposed or innervertically extending head 43, the form of these heads being shown 3 bestin FIG. 4. The head 42 comprises a channel 44 and angles 45 and 46welded to the opposite sides of the channel and having portions in acommon plane adapted to engage the adjacent ends of plywood sheets 35 ofthe form plates 24. Screw threaded rods or bolts 38 and 39 are welded tothe angles 45 and 46, respectively, and extend horizontally therefrom asshown in FIGS. 4 and 13, and through openings in the form of slots 50(FIG. 12) in angle members 51 and 52 secured respectively to the topmembers 36 of each form plate. Suitable nuts 53 are provided on thethreaded rods 38 and 39 for the purpose of clamping the form platesagainst the angles 45 and 46.

The outer head 42 formed principally by the members 44, 45 and 46, isprovided with a horizontal plate 54 adjacent its upper end, and anL-shaped lug 55 adjacent its lower end as shown best in FIGS. 1, and 13.These parts form a portion of the means for supporting the outer head onthe adjacent bracket post member 23, a pair of U-shaped members 56 beingbolted to the plate 54 and carrying screw threaded rods 58 which extendoutwardly from the bracket and through holes in an angle member 59secured to the upper end of the post member 23, nuts 60 being providedon both sides of the angle 59 to facilitate the positioning of the upperportion of the form plate 24 with respect to the upper end of the postmember 23.

A U-shaped member 61 is similarly bolted to the lower plate 55 on thehead 42 and carries a screw-threaded rod 62 which extends outwardlythrough holes in the walls of the post member 23, and is provided withnuts 63 for positioning and supporting the lower portion of the formplate from the post member 23. Preferably, an angle member 65, seen bestin FIG. 5 is welded to the lower portion of the post member 23 so thatwedge blocks 66 may be inserted intermediate the ends of the anglemember 65 and the adjacent ends of the members 36 of the form plates.

Generally, the opposing or inner head 43 as shown in FIG. l is supportedfrom the outer head 42, although the inner head also rests on animmediately lower inner head 43. For this purpose bolt devices B areinserted intermediate the outer and inner heads, as shown best in FIGS.1, 4, 6 and 14. These bolts are generally of a form cornprising acentral rod 70, a pair of collars or washers 71 screw threaded thereon,screw threaded sleeve members 72 and 72 extending outwardly from thecollars, and nuts 34 and 73 on the outer ends of the screw threadedmembers 72 and 72 respectively. As shown in FIGS. 6 and 14, arectangular plate washer 74 is inserted between the nut 34 and theadjacent angle members 25. The outer heads 42 are provided with channelmembers 44 in order to provide the concrete wall W with vertical ribs 7S(FIG. 4). As it is frequently not necessary to provide the inner surfaceW of the wall with similar vertical ribs, the inner head 43, as shown inFIG. 4, is provided with a relatively at surface extending between theadjacent form plates 40.

To secure the inner form plates 40 to the inner head 43, the inner heads43 are provided with inwardly extending screw threaded rods 80 as shownin FIGS. 1, 4 and 11. A form plate bracket consisting of a pair ofvertically extending and parallel angle members 81 and 82 and anglecross members 83 are positioned with the angle members 81 and 82, asshown in FIGS. 4 `and 11, against the adjacent ends of the form platemembers 36, and are tightened against the form plate members by means ofnut devices 87 on the screw threaded rods 80, the rods 80` extendingthrough openings or slots in the angle members 83.

In addition to supporting the form plates, the brackets also serve `as ameans for supporting an upper scaffold bracket 90 and a lower scaffoldbracket 91. The upper scaffold bracket 90 is suitably secured at itsinner end to the post member 23 by means of a bolt 92 (FIG. 6) and atits outer end carries a vertical post 93 reinforced by a plate 94. Thecustomary scaffolding boards 95 are supported by these brackets.Preferably, a brace 96 is provided intermediate the outer end of thebracket and the plate 27 on the channel-like members 20.

Similarly, a lower scaffolding bracket 91 has an upright post 98 and areinforcing plate 99. The inner end of the bracket 91 is bolted to anglemembers 100, FIGS. 1, 8 and 9, the upper ends of which are bolted orriveted to the lower ends of plates 25 of the channel-like member 20.The lower ends of the members 100 are secured to one end of a brace 101(FIG. 9), the other end of which is secured to the bracket 91. Planks102 rests on the bracket 91. Preferably, the posts 93 and 98 of thescaffolding brackets are provided with pipe railings 103. Thescaffolding boards 95 and 102 shown in FIGS. l, 2 and 3 on the inside ofthe wall W are adapted to be supported by inside brackets 10.

In using the invention, the lowermost portion of a concrete wall isgenerally formed by using form plates supported by other means and isprovided with bolt devices B aligned vertically so that they may beentered through the slot 21 in the members 20. Outer and inner bracketsare then secured to the lower portion of the wall in positions tosupport form plates 24 and 40 in the manner shown in FIGS. 1 to 3. Afterconcrete has been poured between the form plates 24 and 40 around anentire Wall structure and the concrete has set sufficiently, the nuts 34and 73 on the bolt devices B are loosened after blocks and tackle orother hoisting devices (not shown) have been secured between ringdevices secured to the plates 74 on the upper bolt devices B of apreviously formed section of the wall and hook bars 111 (FIGS. 1 and 8)secured to the lower ends of the members 20. Then with the nuts on thebolts loosened, the various brackets may be raised until the form platesthereon are in raised positions similar to that shown in FIG. 1.

When form plates are four feet high the crew may raise a rst pair ofouter brackets about two feet and then While those brackets are raisedthe additional two feet, other crew members raise adjacent brackets sothat the scaffolding never slants more than two feet between adjacentbrackets. The form plates are held and carried up by the heads at thebrackets, the intermediate heads, being elevated manually or leapfroggedone over the other for each four foot elevation of the brackets.

Preferably, as a safety feature, the brackets are provided with holes111 in the angles 25 and plates 25 to receive bolts 112 (FIGS. 1 and 10)which extend across and above members 72 on adjacent bolts B (FIG. 14)so as to engage therewith and prevent falling of the bracket. If thebolts B are spaced two feet apart vertically in a particularinstallation the holes 111 for example may be one foot apart.

I claim:

1. A form plate supporting bracket for use in the construction of pouredconcrete walls comprising a lower vertically arranged channel-likemember with a slot extending longitudinally thereof, said slot beingconstructed so that the channel member may slide vertically on and besupported on a vertical row of bolts located in and projectinghorizontally from previously poured and hardened concrete as the bracketis moved vertically from one position to another with the boltsprojecting through the slot, said bracket normally positioned againstand with its upper end near the top of the previously poured concrete,and an upper post member projecting upwardly from the channel-likemember, -nut devices on said bolts for securing the bracket in itsnormal position whereby the bracket may slide directly against apreviously poured section of concrete and be anchored in the previouslypoured section after the nuts are loosened, means on Said post memberfor supporting form plates for the next higher section of wall to bepoured, and bolt means through said post member for positioning at leastin part said post member prior to when concrete is poured on theadjacent plates, said bracket being constructed so that it may be movedupwardly with the bolt means sliding through said slot whereby removalof the bolt means is unnecessary.

2. A form plate supporting bracket as dened in claim 1 in which themeans on the post member for supporting form plates comprises inner andouter upright channellike heads having laterally extending at portionsadapted to fit against the adjacent edges of the form plates, means forsecuring one of said heads to the upper end of said post, and means forsecuring the lower end of the same head to the lower portion of saidpost.

3. A form plate supporting bracket as defined in claim 1 having an upperscaffold supporting bracket secured to the upper portion of saidchannel-like member and a lower scaffold supporting bracket carried onthe lower portion of said channel-like member.

4. A form plate supporting bracket as dened in claim 1 in -which thechannel-like member is provided with pairs of openings and ahorizontally extending bolt secured in a pair of said openings andadapted to rest on and to be supported by the extending portion of abolt in y said vertical row to prevent the bracket from dropping.

References Cited UNITED STATES PATENTS ROY D. FRAZIER, Primary ExaminerJ. FRANKLIN FOSS, Assistant Examiner U.S. C1. X.R.

